Lenticular material on a computer screen

[georggms@xxxxxxxxxx (George Gioumousis)]

> 
> Date: Tue, 12 Mar 1996 08:52:32 -0500
> From: PHOTO3DGUY@xxxxxxx
> To: photo-3d@xxxxxxxxxxxxxxx
> Subject: 3D Video
> 
>  [snip]
> 
> Now if you could place overlaid Nimslo images on the computer screen, and
> place a lenticular overlay on top of your computer screen to yield a real 3D
> image, that might be nice;  such a concept would help the necessity of having
> an actual photographic source (instead of computer graphic source) for such
> images too  !
> 
 > What do you think?
> 
> Glenn, San Diego (southern) California  
> 
A group of unemployed technical types looked at this a few
years ago, and sort of got it to work, but gave up when we
realized how difficult it was, and then started getting jobs.

The Nimslo format involves four color stripes of about .001
inch under each lens. The lens is .005 inch wide. For the 
usual display the pixel is .28mm. Four would be 1.12mm. I
think the lens should be five pixels wide, or 1.40mm, if 
I've done the arithmetic properly in my head. I think this
is .056 inch, which is pretty wide.

We were quoted some horrendous setup price to produce custom
lenticular material; $10,000 comes to mind, but I might be off
by a factor of ten. Then it would be nice to have a perfectly
flat screen.

We scanned two 8x10 BW stereo prints into a Mac, the owner of
the Mac used some arcane software to alternate rows of pixels
from each print, then the problem was to get lenses of the 
right width. Instead, we cleared the image of a Nimslo print
with aqueous sodium hypochlorite, and used a small view camera
to project the image, at just the right size, onto it. The
image was tiny, but those of us with normal eyesight could
see the stereo effect.

Reading the Nimslo patents was fun.

I've heard that a few companies (Sony?) have experimented
with something like this, but I'v never seen it in the 
flesh.

Good luck with your experiments,
George Gioumousis

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